Related Experiment Video
Updated: Mar 1, 2026

Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization
Published on: October 24, 2025
Global oncofertility index-data gap slows progress
Saskia F de Roo1, Alexandra S Rashedi2, Catharina C M Beerendonk3
1Department of Obstetrics and Gynecology, Radboud University Medical Center, Nijmegen, The Netherlands; Northwestern University, Chicago, Illinois, USA.
Abstract:
The number of pediatric and young adult cancer survivors is increasing globally due to earlier diagnostics and expansion of targeted chemo- and biological-based therapeutics. As a consequence, cancer-related infertility and reproductive hormone loss is of increasing concern for both male and female survivors. We attempted to estimate the reproductive loss in oncofertility-practicing countries and to develop a global oncofertility index (OFI). This would allow an accounting of the level of urgency of the issue and would provide national comparisons of fertility loss, which differ based on the prevalence and/or diagnosis frequency and treatment variables by countries or region. While the goal is laudable, an index such as this is unachievable due to the lack of the kind of information that would be necessary to calculate such a meaningful index. Without this metric, we will be unable to assess how oncofertility concerns are being addressed and what lessons can be learned from countries that improve such an index over time.
Insights
Developing a global oncofertility index (OFI) to assess reproductive loss in cancer survivors is currently unachievable due to data limitations. This prevents meaningful comparisons and evaluation of oncofertility care worldwide.
Area of Science:
- Oncology
- Reproductive Medicine
- Public Health
Background:
- Increasing numbers of pediatric and young adult cancer survivors globally.
- Growing concern regarding cancer-related infertility and reproductive hormone loss in survivors.
- Need for standardized metrics to evaluate oncofertility care and outcomes.
Purpose of the Study:
- To estimate reproductive loss in oncofertility-practicing countries.
- To develop a global oncofertility index (OFI) for national comparisons.
- To assess the urgency and current management of oncofertility issues.
Main Methods:
- Exploratory analysis of existing global data on cancer survivorship and reproductive health.
- Conceptual framework development for a potential global oncofertility index.
- Identification of data gaps and limitations for index calculation.
Main Results:
- The development of a meaningful global oncofertility index is currently unachievable.
- Significant data deficiencies exist regarding country-specific reproductive loss metrics.
- Lack of standardized data prevents comprehensive assessment and comparison of oncofertility care.
Conclusions:
- The absence of necessary data precludes the creation of a global oncofertility index.
- Without such a metric, assessing oncofertility care progress and learning from international best practices is hindered.
- Further efforts are needed to collect standardized data to address reproductive health concerns in cancer survivors.
Related Concept Videos
Infertility in Females
Endometriosis, a condition characterized by abnormal growth of...
Infertility in Males
In Vitro Fertilization
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
Cancer Survival Analysis
Tumor Progression
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Treatment Resistant Cancers

